Franklin Wendell Welker (born March 12, 1946) is an American voice actor best known for his role as Fred Jones from the Scooby-Doo franchise since its inception in 1969 and as the voice of Scooby-Doo since 2002. He is also known as the voice of Megatron in the Transformers franchise and as the voice and vocal effects of Nibbler on Futurama.

In 2016, Welker was honored with an Emmy Award for his lifetime achievement.

Welker's first voice role came in 1969, as Fred Jones in the Scooby-Doo franchise. Welker has voiced Fred in almost every series and incarnation of the Scooby-Doo animated franchise (with the exception of A Pup Named Scooby-Doo) and has also provided the voice of Scooby-Doo since 2002.[5] As of 2014, Welker is the last remaining original voice actor in the franchise.

Welker returned to two of his Transformers roles when he portrayed Megatron and Soundwave as part of a spoof in a third-season episode of Robot Chicken, which aired shortly after the release of the first live-action film. In the second Transformers film, Transformers: Revenge of the Fallen (2009), he joined the voice cast and reprised the roles of Soundwave and Ravage, and also provided the voices for Grindor, Devastator, and Reedman. He would again reprise his role as Soundwave, as well as take on the roles of Shockwave and Barricade, in the third film, Transformers: Dark of the Moon (2011). And, in Transformers: Age of Extinction (2014), he would reprise his role as Galvatron, albeit with a much different voice from his performance in the 1980s Generation One series. Welker reprised the voice of Megatron in the fifth installment, Transformers: The Last Knight (2017) taking over from Hugo Weaving who played Megatron in the first three live-action Transformer films.